Hi,
I am comparing two numbers, but it gives strange results:
My Code:
if
then
echo "True"
else
echo "False"
fi
This code gives False for the follwoing comparison
where as True for the following:
Any reason for this? Both Should have given False...
I am using... (9 Replies)
Hello all,
I'm having an infuriating issue with number comparison. Basically I've written a script that runs in cygwin that SSH's to 4 servers, figures out a success percentage and if it is less than a certain point, triggers an alarm. I've managed to get it to connect to the servers, figure out... (5 Replies)
Hello, How do i check number of files currently opening in the linux server? Your help is highly appreciated. Thank you
---------- Post updated at 02:43 PM ---------- Previous update was at 02:19 PM ----------
never mind!! I got it.
---------- Post updated at 02:44 PM ---------- Previous... (3 Replies)
I want to find number of CPU and number NIC card in Linux server.
I have below content in /proc/cpuinfo. I have from processor 0 - 15. It means, i have 15 similar entries in that file. How many CPU we have on this server? also how do find how many NIC card on this?
processor : 0... (5 Replies)
I am trying to run following script in ksh on darwin 11.4.2:
freeSpace=2469606195
spaceNeeded=200
] && echo "no space" || echo "space available"
] && echo "no space" || echo "space available"
"-lt" is giving wrong answer as "no space" Whereas '<' works fine. When I change the freespace... (4 Replies)
Hi All,
I am trying to compare two negative numbers using awk on linux.But it is giving me wrong result.Same code is working perfectly on solaris.
print ((0+new_price) < MIN_PRICE)
e.g If I try to compare -1.32(new_price) and -500(min_price) using "<" operator, output is 1 i.e true.
... (5 Replies)
Discussion started by: Rashmee
5 Replies
LEARN ABOUT DEBIAN
bup-margin
bup-margin(1) General Commands Manual bup-margin(1)NAME
bup-margin - figure out your deduplication safety margin
SYNOPSIS
bup margin [options...]
DESCRIPTION
bup margin iterates through all objects in your bup repository, calculating the largest number of prefix bits shared between any two
entries. This number, n, identifies the longest subset of SHA-1 you could use and still encounter a collision between your object ids.
For example, one system that was tested had a collection of 11 million objects (70 GB), and bup margin returned 45. That means a 46-bit
hash would be sufficient to avoid all collisions among that set of objects; each object in that repository could be uniquely identified by
its first 46 bits.
The number of bits needed seems to increase by about 1 or 2 for every doubling of the number of objects. Since SHA-1 hashes have 160 bits,
that leaves 115 bits of margin. Of course, because SHA-1 hashes are essentially random, it's theoretically possible to use many more bits
with far fewer objects.
If you're paranoid about the possibility of SHA-1 collisions, you can monitor your repository by running bup margin occasionally to see if
you're getting dangerously close to 160 bits.
OPTIONS --predict
Guess the offset into each index file where a particular object will appear, and report the maximum deviation of the correct answer
from the guess. This is potentially useful for tuning an interpolation search algorithm.
--ignore-midx
don't use .midx files, use only .idx files. This is only really useful when used with --predict.
EXAMPLE
$ bup margin
Reading indexes: 100.00% (1612581/1612581), done.
40
40 matching prefix bits
1.94 bits per doubling
120 bits (61.86 doublings) remaining
4.19338e+18 times larger is possible
Everyone on earth could have 625878182 data sets
like yours, all in one repository, and we would
expect 1 object collision.
$ bup margin --predict
PackIdxList: using 1 index.
Reading indexes: 100.00% (1612581/1612581), done.
915 of 1612581 (0.057%)
SEE ALSO bup-midx(1), bup-save(1)BUP
Part of the bup(1) suite.
AUTHORS
Avery Pennarun <apenwarr@gmail.com>.
Bup unknown-bup-margin(1)